Question

Define hess's low of conatant heat summation

Answer 1

Answer:

Hess’s Law of Constant Heat Summation :

$\textsf{\underline {The basis of Hess's law is that enthalpy is a state function.}}$

According to this law, the change in enthalpy remains constant whether the process is carried out in one step or in more than one step.

$\textsf{\underline {\large{Applications of Hess Law}}}$ :

1. Calculation of enthalpy of formation.

2. Calculation of $\mathsf{_{c}H}$

3. Calculation of Enthalpy of reaction.

4. Calculation of enthalpy of allotropic transformation.